<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>hello world 和 counter</title>
</head>
<body>
    <script src="https://unpkg.com/vue@next"></script>

    <div id="root">
       
    </div>
   
    <script>
        
        Vue.createApp({
            data(){
                return{
                    content:1
                }
            },

            mounted(){
                setInterval(() => {
                    this.content += 1; 
                }, 1000);
            },


            template:`<div>{{content}}</div>`
        }).mount("#root")
    </script>

</body>
</html>